Alert archive / Illinois / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 80, NWS St. Louis, MO

May 26, 2004Monroe County, Illinois; Jefferson County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at May 26, 2004, 8:51 AM CDT for Monroe County, Illinois; Jefferson County, Missouri. It was in force for 39 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
May 26, 2004, 8:51 AM CDT (13:51 UTC)
Expired
May 26, 2004, 9:30 AM CDT
In force
39 min
Issued by
NWS St. Louis, MO
Area
Counties, with a storm outline in the text

Counties Monroe County, IL, Jefferson County, MO

The radar

The St Louis radar (KLSX), 55 km from the middle of the area, began a volume at 13:52 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
May 26, 8:50 AM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 1.9 hours before the alert went out and 259 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Lincoln, IL at 12:00Z on 2004-05-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 12:00Z on 2004-05-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -20 square meters per square second.1939587897117136Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1078 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
-20 m²/s²
0-3 km storm-relative helicity
43 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

629 
WUUS53 KLSX 261351
SVRLSX
ILC133-MOC099-261430-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
851 AM CDT WED MAY 26 2004

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN JEFFERSON COUNTY IN EAST CENTRAL MISSOURI
  MONROE COUNTY IN SOUTHWEST ILLINOIS

* UNTIL 930 AM CDT

* AT 851 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER HILLSBORO...MOVING NORTHEAST AT 45 MPH.
  THE PRIMARY THREAT FROM THIS STORM WILL BE DAMAGING HAIL.

* LOCATIONS IMPACTED INCLUDE...
  PEVELY
  BARNHART
  VALMEYER
  FOUNTAIN
  WATERLOO
  NEW DESIGN

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH...
DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR
PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME
OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO
AREAS WHERE WATER COVERS THE ROAD.

LAT...LON 3821 9067 3808 9051 3823 9004 3837 9010
          3851 9026

$$

WDB/RP

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 26, 8:13 AM CDTSevere Thunderstorm WarningLSXCalhoun32 min
May 26, 8:20 AM CDTSevere Thunderstorm WarningLSXJersey40 min
May 26, 8:39 AM CDTSevere Thunderstorm WarningLSXMacoupin, Madison51 min
May 26, 8:56 AM CDTSevere Thunderstorm WarningLSXSaint Clair, Washington49 min
May 26, 1:10 PM CDTSevere Thunderstorm WarningLSXMonroe, Randolph50 min
May 26, 4:17 PM CDTSevere Thunderstorm WarningLSXMadison43 min
May 26, 4:59 PM CDTSevere Thunderstorm WarningLSXBond46 min
May 26, 5:47 PM CDTSevere Thunderstorm WarningLSXMarion28 min
May 26, 6:04 PM CDTSevere Thunderstorm WarningLSXMacoupin41 min
May 26, 6:19 PM CDTSevere Thunderstorm WarningLSXCalhoun26 min
May 26, 6:21 PM CDTSevere Thunderstorm WarningLSXMontgomery54 min
May 26, 6:40 PM CDTSevere Thunderstorm WarningLSXMadison50 min
May 26, 6:43 PM CDTSevere Thunderstorm WarningLSXMadison62 min
May 25, 8:04 PM CDTSevere Thunderstorm WarningLSXSainte Genevieve41 min
May 26, 7:44 AM CDTSevere Thunderstorm WarningLSXLincoln, Montgomery, Pike46 min
May 26, 8:14 AM CDTSevere Thunderstorm WarningLSXFranklin, Gasconade46 min
May 26, 8:16 AM CDTSevere Thunderstorm WarningLSXOsage44 min
May 26, 8:40 AM CDTSevere Thunderstorm WarningLSXSaint Charles, Saint Louis50 min
May 26, 9:21 AM CDTSevere Thunderstorm WarningLSXSainte Genevieve, Saint Francois39 min
May 26, 11:56 AM CDTSevere Thunderstorm WarningLSXFranklin, Gasconade49 min
May 26, 12:31 PM CDTSevere Thunderstorm WarningLSXFranklin, Jefferson, Washington44 min
May 26, 2:26 PM CDTSevere Thunderstorm WarningLSXIron, Madison, Saint Francois64 min
May 26, 4:06 PM CDTSevere Thunderstorm WarningLSXSaint Charles, Saint Louis24 min
May 26, 4:31 PM CDTSevere Thunderstorm WarningLSXSaint Louis, City of Saint Louis14 min
May 26, 5:29 PM CDTSevere Thunderstorm WarningLSXLincoln46 min
May 26, 5:41 PM CDTSevere Thunderstorm WarningLSXMontgomery, Warren49 min
May 26, 6:30 PM CDTTornado WarningLSXFranklin, Saint Charles, Saint Louis45 min
May 26, 6:36 PM CDTSevere Thunderstorm WarningLSXCrawford39 min
May 26, 6:46 PM CDTTornado WarningLSXCrawford44 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2004Severe Thunderstorm Warnings in Missouri, 2004Every severe thunderstorm warning in 2004

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.